www.pudn.com > rm52c.rar > nal.c

/* 
*********************************************************************** 
* COPYRIGHT AND WARRANTY INFORMATION 
* 
* Copyright 2001, International Telecommunications Union, Geneva 
* 
* DISCLAIMER OF WARRANTY 
* 
* These software programs are available to the user without any 
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* statutory, including any implied warranties of merchantability 
* or of fitness for a particular purpose.  In no event shall the 
* contributor or the ITU be liable for any incidental, punitive, or 
* consequential damages of any kind whatsoever arising from the 
* use of these programs. 
* 
* This disclaimer of warranty extends to the user of these programs 
* and user's customers, employees, agents, transferees, successors, 
* and assigns. 
* 
* The ITU does not represent or warrant that the programs furnished 
* hereunder are free of infringement of any third-party patents. 
* Commercial implementations of ITU-T Recommendations, including 
* shareware, may be subject to royalty fees to patent holders. 
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/*! 
 ************************************************************************ 
 * \file  nal.c 
 * 
 * \brief 
 *    Converts Encapsulated Byte Sequence Packets (EBSP) to Raw Byte  
 *    Sequence Packets (RBSP), and then onto String Of Data Bits (SODB) 
 * 
 * \author 
 *    Main contributors (see contributors.h for copyright, address and affiliation details) 
 *    - Shankar L. Regunathan  
 ************************************************************************ 
 */ 
 
#include "contributors.h" 
 
#include  
#include  
#include  
#include  
#include  
 
#include "defines.h" 
#include "global.h" 
 
/*! 
************************************************************************ 
* \brief 
*    Converts Encapsulated Byte Sequence Packets to RBSP 
* \param streamBuffer 
*         pointer to data stream 
*  \param end_byte_pos 
*         size of data stream 
*  \param begin_byte_pos 
*          Position after beginning  
************************************************************************/ 
 
 
int EBSPtoRBSP(byte *streamBuffer, int end_bytepos, int begin_bytepos) 
{ 
  int i, j, count; 
  count = 0; 
   
  if(end_bytepos < begin_bytepos) 
    return end_bytepos; 
   
  j = begin_bytepos; 
   
  for(i = begin_bytepos; i < end_bytepos; i++)  
  { //starting from begin_bytepos to avoid header information 
    if(count == ZEROBYTES_SHORTSTARTCODE && streamBuffer[i] == 0x03)  
    { 
      i++; 
      count = 0; 
    } 
    streamBuffer[j] = streamBuffer[i]; 
    if(streamBuffer[i] == 0x00) 
      count++; 
    else 
      count = 0; 
    j++; 
  } 
   
  return j; 
}